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Re:Launching Default End-to-End Encryption on Messenger by sneak on Thursday December 07, 2023 @01:06AM (#38553378)
It is completely anonymous, there is no link from the telephone number used to register to the person using it.
Re:Launching Default End-to-End Encryption on Messenger by lxgr on Thursday December 07, 2023 @01:11AM (#38553402)
Yes, but you only have one number/identifier that links you across all contexts. That’s a pseudonym, which is a different thing from being anonymous.

You’d need multiple phones and a phone number per context to be actually anonymous. That’s just not practicable for many people, I’d say.